Texture Filtering
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Home > Art, Film & Photography > Texture Filtering: Anisotropic Filtering, Bilinear Filtering, Mipmap, Trilinear Filtering, Nearest-Neighbor Interpolation
Texture Filtering: Anisotropic Filtering, Bilinear Filtering, Mipmap, Trilinear Filtering, Nearest-Neighbor Interpolation

Texture Filtering: Anisotropic Filtering, Bilinear Filtering, Mipmap, Trilinear Filtering, Nearest-Neighbor Interpolation


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About the Book

Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Not illustrated. Excerpt: In 3D computer graphics, anisotropic filtering (abbreviated AF) is a method of enhancing the image quality of textures on surfaces that are at oblique viewing angles with respect to the camera where the projection of the texture (not the polygon or other primitive on which it is rendered) appears to be non-orthogonal (thus the origin of the word: "an" for not, "iso" for same, and "tropic" from tropism, relating to direction; anisotropic filtering does not filter the same in every direction). Like bilinear and trilinear filtering it eliminates aliasing effects, but improves on these other techniques by reducing blur and preserving detail at extreme viewing angles. Anisotropic filtering is relatively intensive (primarily memory bandwidth and to some degree computationally, though the standard space-time tradeoff rules apply) and only became a standard feature of consumer-level graphics cards in the late 1990s. Anisotropic filtering is now common in modern graphics hardware and is enabled either by users through driver settings or by graphics applications and video games through programming interfaces. Hereafter, it is assumed the reader is familiar with MIP mapping. If we were to explore a more approximate anisotropic algorithm, RIP mapping (rectim in parvo) as an extension from MIP mapping, we can understand how anisotropic filtering gains so much texture mapping quality. If we need to texture a horizontal plane which is at an oblique angle to the camera, traditional MIP map minification would give us insufficient horizontal resolution due to the reduction of image frequency in the vertical axis. This is because in MIP mapping each MIP level is isotropic, so a 256 256 texture is downsized to a 128 128 image, then a 64 64... More: http: //booksllc.net/?id=621404


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Product Details
  • ISBN-13: 9781158302215
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • Sub Title: Anisotropic Filtering, Bilinear Filtering, Mipmap, Trilinear Filtering, Nearest-Neighbor Interpolation
  • Width: 229 mm
  • ISBN-10: 1158302215
  • Publisher Date: 20 Jun 2010
  • Binding: Paperback
  • Spine Width: 2 mm
  • Weight: 59 gr


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